Algorithms (forward, backprop/SGD, init, move_weights, diagnostics) now live
once in MLPCore<Storage> (nisps/ml/mlp.hpp). Storage models:
- FixedStorage (storage.hpp): template-sized std::array, zero heap. The
classic MLP<NIn,H1,H2,H3,NOut,...> is an alias preserving kInput/kHidden*/
kOutput/kNumLayers/weight_count() constexpr — firmware + bindings + modes
compile unchanged.
- DynamicStorage (dynamic_storage.hpp): runtime dims, ONE arena allocation
at construction, nothing per-call. #error under NISPS_TARGET_EMBEDDED
(new macro in core/perf.hpp); sole lint-cpp.sh heap-allowlist entry, plus
a lint check that fails if the #error guard disappears.
Verification:
- new ctest test_mlp_storage_parity: fixed↔dynamic BIT-identical across
init/draw/inference/train(FIFO)/move_weights(pin mask)/eval_loss/
layer_stats/set_weights/infer_batch/reset; invalid+moved-from inert
- golden ML vectors (pre-refactor constants) pass → bit-stable refactor
- native↔WASM parity PASS, max delta unchanged (2.4e-7)
- chokepoint B compile: PAFSynth .text 122324→122692 (+0.30%, ±1% budget);
RAM +416B (eval scratch)
- fix: firmware-common.sh used bare 'python' (absent here) → ${PYTHON:-python3}
Part of one-core-engine-refactor P2. nisps_ml_create ABI untouched (P2.2 is
an operator stop-point).
Consolidate docs/slp-workshop/SPEC.md into docs/specs/slp-workshop-
firmware.md so the project has a single SLP-Workshop spec. The unified
spec is now two parts:
- Part I (§1-8, shipped/stable): the mode + Jolt & OU-explore gestures.
- Part II (§9-13, planned): the output-mode evolution — Continuous/Rhythm
stream model, gate sequences, CV/MIDI output config, Manifold UX, and
the locked operator decisions (2026-06-28).
Frontmatter bumped stable -> evolving (the doc now spans shipped +
planned). Donor docs/slp-workshop/SPEC.md removed; README.md row and
MAP.md ## Specs note updated. No code change.
Self-contained stable reference spec crystallizing the SLP-Workshop
firmware: the MEMLCelium-based mode, the two adaptive-learning gestures
ported from upstream InterfaceRL (Jolt held weight-morph, OU output
walk) with exact constants, the runtime-not-compile-time + inert-by-
default design, the ModeBase integration incl. the GCC -Wstringop-
overflow workaround, control mappings, schema/codegen, and the
browser-parity caveat. Adds the spec to docs/specs/README.md and a
## Specs section to MAP.md per the specs-skill config format.
Refs commits 4e60d01, 57c9ede (merged at 527b8fc).
Spec-only (firmware fork is WIP, built by another agent). Captures: memlcelium
is a single shared-net hybrid (14 ratio-seq + 42 synth outputs); the two-stream
model (Continuous + Rhythm); firmware 3 compile-time modes + browser's 4th
split-net hybrid; gate-sequence config for CV & MIDI (counts + shared/separate
net toggle; XY-pad→2nd pad / gamepad→double-stick); CV jack allocation
(11 CV + 3 gate, swap CV→gate); RatioSeq gate generation; no wire-protocol change.
Restores the April-2026 "uSEQ-Celium" functionality (browser → uSEQ
hardware + CV expander over USB Web Serial) as a first-class Manifold
Outputs backend, and re-vendors the RP2040 firmware into the repo.
- protocol v2 (uSEQ-CV): firmware/useq-celium/shared/protocol.h is the
single source of truth, mirrored by manifold/src/backends/useq-protocol.ts.
26-byte OUTPUT frame, 11×u16 CV (12-bit) + 3-gate bitfield + XOR; fixed
topology; host-agnostic so the MEMLNaut RP2350 can emit identical bytes.
Spec in docs/useq-celium/protocol.md.
- firmware/useq-celium/{main,expander}: PlatformIO RP2040 firmware rewritten
to v2 from the real April pin maps (expander I2C addr 0x10).
- UseqCvBackend (id cvgate): Web Serial connect/identify/disconnect, 100 Hz
stream, per-channel dead-zone, gate thresholding; modeled on midi-backend.
Per-output CvSpec (channel + gateThreshold) on MFParam; config UI in
OutputsBackendConfig + BackendAdvanced; new "CV / uSEQ" top-dock mode.
- bun-test for the protocol frame layout; MAP.md updated.
Wire the modular input layer into the Console and reshape the browser
engine so input axes are genuine independent dimensions.
Inputs (manifold/src/inputs/):
- gamepad-source: emit press+release edges with standard-mapping labels
(enables hold-and-move); single/double-stick already present.
- midi-input-source: single-device selection + batch "MIDI Learn"
(every CC swept while armed becomes an axis); notes stay discrete.
- input-layer: compose() forwards each axis 1:1 (no mean-blend);
add onReducedInput so the manifold tracks gamepad/MIDI position.
- types: InputAction.phase, InputMode.
Console (manifold/src/console/):
- ConsoleApp: bind gamepad buttons to verdicts (RB up / LB down /
X randomise / Y nudge / B undo / A-hold reposition); mirror composed
position onto the manifold.
- Drawers: rebuilt Inputs drawer (source picker, gamepad legend, MIDI
device picker + batch-learn flow, learned-control meters).
Engine (nisps/wasm, manifold/src/engine):
- DefaultMLP widened MLP<2,..> -> MLP<32,..> (32 = MAX_AXES); each
active axis gets a dedicated slot, unused slots held at 0 (inert).
Rebuilt nisps.wasm (playground + manifold).
- spine/engine-api: setInputs writes the full N-D vector (was dropping
arr[2+]); primary pair keeps the 2-D pipeline; process() re-ticks the
whole vector via spine.reprocess().
Tests:
- parity_check/parity_wasm: ParityMLP -> 32 inputs, widen example bufs.
- CMakeLists: build parity binary with -ffp-contract=off so native
matches FMA-free WASM (training amplified the gap past 1e-5).
Inputs dock is still an exclusive picker; mixing toggles, reshape modal,
and the >2-D slider view (inputs-spec.md) are groundwork-laid but not
yet wired. See docs/redesign/midi-gamepad-inputs-worklog.md.
Source: archive/playground-redesign-2026-snapshot branch (commit 287e3a1).
Reference-only — playground is being rewritten in SolidJS, so the redesign's
implementation will not be merged, but its design intent is preserved here
for the rewrite team.
